Calculate the number 846
NUMBERMANIA: Calculate the number 846 using numbers [3, 4, 9, 2, 83, 598] and basic arithmetic operations (+, -, *, /). Each of the numbers can be used only once.Correct answers: 1
#brainteasers #math #numbermania
Edison patentsIn 1881, six patents were issued to Thomas A. Edison for electrical inventions, U.S. Nos. 242,896 to 242,901. They were for, respectively, two concerning an "Incandescent Electric Lamp," an "Incandescent Electric Lamp," a "Magneto or Dynamo Electric Machine," about "Electric Lighting," about "Manufacturing Carbons for Electric Lamps" and an "Electric Meter." |